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HW2_10 (1) - CE 774 Spring 2010 Homework 2 Stoichiometry...

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CE 774 – Spring 2010 Homework 2: Stoichiometry and Bacterial Energetics Due: Wednesday, Feb. 16, 2010 1. For each combination of electron donor, electron acceptor, carbon source, and N source, indicate whether fs ° increases or decreases compared to the previous case. Electron donor Electron acceptor Carbon source Nitrogen source fs ° glucose O 2 glucose NH 4 + glucose NO 3 - glucose NH 4 + glucose NO 3 - glucose NO 3 - glucose NO 3 - CO 2 NO 3 - glucose O 2 CO 2 NO 3 - NH 4 + O 2 CO 2 NO 3 - NH 4 + O 2 glucose NO 3 - NH 4 + O 2 glucose NH 4 + Acetate O 2 glucose NH 4 + Acetate CO 2 glucose NH 4 + Acetate CO 2 CO 2 NH 4 + H 2 CO 2 CO 2 NH 4 + H 2 SO 4 2- CO 2 NH 4 + 2. Your consulting company was hired by an industry to explore treatment options for their wastestream. Their waste has a high nitrate content, but a low level of organic compounds. No other wastewater stream high in organics is available for blending wastestreams, so an alternative electron donor for denitrification is required. Your group was assigned to the job. a. You received prices of several available electron donor alternatives from a local chemical supplier (Table 1).
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